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Finding the Fourth Proportional to 20,256, 30,399.66 and 14,059.50

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Solution

The fourth proportional to 20,256, 30,399.66 and 14,059.50 is: 21,100.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,256 : 30,399.66 = 14,059.50 : x
  2. Step 2: Convert to fraction form
    20,256/30,399.66 = 14,059.50/x
  3. Step 3: Cross multiply
    20,256x = 30,399.66 × 14,059.50
  4. Step 4: Simplify right side
    20,256x = 427,404,019.77
  5. Step 5: Solve for x
    x = 427,404,019.77/20,256
  6. Step 6: Final answer
    x = 21,100.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.